JP2000318757A - Lids and packaging containers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an opening by grasping and pulling the tab part of a lid, by forming at the perimetrical edges of the lid two unsealing ends with the tab part therebetween and also forming an unsealing means extending inside from the unsealing ends. SOLUTION: An unsealing means having two unsealing ends 2a and 2b formed at perimetrical edges, using an area between the unsealing ends 2a and 2b as a tab part 3, and comprising perforations 2 with an intermittent inseparable part in the form of a loop connecting the unsealing ends 2a and 2b is formed near and along the inner edge of a heat bond area 5' serving as a heat bond part which is annularly formed when a lid is heat bonded to a container. In a base layer 11, the perforations 2 are made through the base 11 and are covered with a bonding layer 12, an aluminum foil layer 13 and a heat bondable resin layer 14. Because the adhesive layer 12, aluminum foil layer 13 and heat bondable resin layer 14 covering the perforations 2 are each relatively thin and made of a easy-to-tear material, the lid 1 can be easily cut off along the perforations 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid material which is thermally bonded to the mouth of a container and a packaging container using the lid material.

[0002]

2. Description of the Related Art Conventionally, paper / polyethylene / aluminum foil / polyethylene / heat-adhesive resin layers have been used as cover materials which are attached to the mouth of a polystyrene container or paper cup container for packaging cup ramen or the like by thermal bonding. A laminated structure or a laminated structure of paper / polyethylene / aluminum foil / heat-adhesive resin layer is generally used. After the lid materials are thermally bonded to the above-mentioned container, the lid material is A strong force is required to separate the container from the container, and in the case of a container having a non-rigid flange, there is a disadvantage that the mouth of the container is deformed. In particular, the lid member having the above configuration, an outer container having a bottom surface and side surfaces formed by bending a blank plate made of paperboard, and an inner container having a flange formed by thermoforming a thermoplastic resin sheet, When the inner surface of the outer container and the outer surface of the inner container are brought into close contact with each other and used by being thermally bonded to the flange made of the thermoplastic resin sheet of the container, the thermoplastic resin is used when the lid material is peeled off and opened. There is a problem that the container is deformed because the flange made of the sheet has no rigidity.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to form an opening easily without deforming the container when the lid is peeled off and opened, even when used for a container having a flange having no rigidity. And a packaging container using the lid material.

[0004]

A lid material having a base layer on the outer surface, a heat-adhesive resin layer on the inner surface, and a knob formed at an outer end for use by being thermally bonded to a container. , While two opening ends sandwiching the knob portion are formed on the outer peripheral edge of the lid material,
A lid member having a configuration in which opening means extending inward from two opening ends are formed. In the case of this lid material, instead of peeling off the heat-bonded portion of the lid material that has been thermally bonded to the container and opening it, the user grips the tab of the lid material and pulls it along the opening means from two open ends. It is possible to cut the lid material to form an opening, and the opening can be formed with a small force.

[0005] In the above-mentioned lid material, the opening means is formed in a loop shape connecting two opening ends.
The opening can be formed by cutting the lid material from the two opening ends along the opening means, and the opening can be formed with a small force.

In the above-mentioned lid material, the opening means is provided along the vicinity of the inner end of the heat-bonded portion formed in an annular shape when the lid material is thermally bonded to the container, so that the lid material is formed. By cutting along the opening means, a large opening can be formed along the vicinity of the inner end of the thermal bonding portion.

In the above lid material, the opening means is a cut having an intermittent non-cut portion penetrating the base material layer, so that the lid material can be easily cut off along the cut formed in the base material layer. Can be.

In the above-mentioned lid material, by forming a cut through the lid material at the opening end, the lid material can be cut off along the cut so that opening can be easily started.

[0009] In the above-mentioned lid material, by having an aluminum foil layer between the base material layer and the heat-adhesive resin layer, a lid material having excellent gas barrier properties can be obtained.

The above-mentioned cover material is formed on an inner surface of an outer container having a bottom surface formed by bending a blank plate made of paperboard and a side surface connected to the periphery of the bottom surface, and a thermoplastic resin sheet formed by thermoforming the inner surface of the outer container. This is a packaging container configured to be attached by heat bonding to a flange of a container consisting of an inner container having a flange positioned at the upper end of the side surface of the outer container, which is integrated in close contact. By gripping and pulling the tab of the lid of the packaging container and pulling it, the lid can be cut off and opened along the opening means with a small force, so that the container flange is made of a thermoplastic resin sheet and has no rigidity. However, it can be opened without being deformed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a first embodiment of the lid member of the present invention, FIG. 2 is a cross-sectional view taken along the line II in FIG. 1, and FIG. 3 corresponds to FIG. 2 showing a second embodiment of the lid member of the present invention. FIG. 4 is a cross-sectional view, FIG. 4 is a plan view showing a third embodiment of the lid of the present invention, FIG. 5 is a plan view showing a fourth embodiment of the lid of the present invention,
FIG. 6 is a perspective view showing an embodiment of the packaging container of the present invention, and FIG.
Is a sectional view taken along the line II in FIG. 6, wherein 1, 1 ', 1 ", 1"' is a lid material, 2, 2 ', 2 ", 2"' are notches, 2a, 2b are unsealing ends, 2a ', 2
b 'is cut, 3, 3' is knob, 4 is container, 4a is outer container, 4b
Is an inner container, 41 is a flange, 42 is a paragraph, 43 is a step, 5 is a heat bonding part, 5 ', 5 "is a heat bonding area, 11 is a base material layer, 12 is a bonding layer, and 13 is an aluminum foil layer. , 14 represent a heat-adhesive resin layer, and 15 represents a picture layer.

A lid 1 according to a first embodiment of the present invention is as shown in FIGS. As shown in FIG. 1, the planar shape is an octagon, and two opening ends 2 a and 2 b are formed on the outer peripheral edge, and a region sandwiched between the opening end 2 a and the opening end 2 b is formed as a knob 3. Opening means comprising a cut 2 having an intermittent non-cut portion in a loop connecting the opening end 2a and the opening end 2b,
This is a configuration in which the lid member is formed along the vicinity of the inner end of the thermal bonding region 5 ′ that becomes a thermal bonding portion formed in an annular shape when the lid material is thermally bonded to the container. In the first embodiment, the opening means is formed by the cut 2 having an intermittent non-cut portion, but may be a complete cut having no non-cut portion. In the case of the cut 2 having an intermittent non-cut portion, it is preferable to shorten the length of the non-cut portion and increase the length of the cut portion. Although the shape of the lid member of the first embodiment is octagonal, it may be any shape such as a circular shape, an elliptical shape, or a square shape depending on the shape of the opening of the container to be used.

The cross-sectional shape of the lid 1 according to the first embodiment is shown in FIG.
As shown in the figure, the pattern layer 15, the base layer 11, the adhesive layer 12, the aluminum foil layer 13, and the thermo-adhesive resin layer 14 are laminated in order from the outer surface, and the base layer 11 is formed on the base layer 11. A cut 2 is formed so as to penetrate, and the cut 2 is configured to be covered with an adhesive layer 12, an aluminum foil layer 13, and a heat-adhesive resin layer 14. Adhesive layer 12 and aluminum foil layer covering notch 2
Since the material 13 and the heat-adhesive resin layer 14 are relatively thin and easily tearable, the lid 1 can be easily cut along the cuts 2.

The lid 1 'of the second embodiment of the present invention has the same planar shape as that of the first embodiment. As shown in FIG. 3, the cross-sectional shape is such that a pattern layer 15, a base layer 11, and a thermo-adhesive resin layer 14 are laminated in this order from the outer surface, and a cut 2 penetrating the base layer 11 is formed in the base layer 11. The cut 2 is covered with a heat-adhesive resin layer 14. Thermal adhesive resin layer 14 covering notch 2
Is thin and easy to tear, so that the lid 1 can be easily cut off along the cuts 2.

The shape of the lid 1 "according to the third embodiment of the present invention is as shown in Fig. 4, and the laminated structure is the same as that of the first embodiment shown in Fig. 2. The lid according to the third embodiment. 1 "has a circular shape and is provided with a cut 2a 'and a cut 2b' which are two unsealing ends on the outer peripheral edge, and a region sandwiched between the cut 2a 'and the cut 2b' is a knob 3 Opening means comprising a cut 2 'having an intermittent non-cut portion in a loop connecting the cut 2a' and the cut 2b 'is formed in an annular shape when the lid material is thermally bonded to the container. In the third embodiment, the opening means is not a cut 2 'having an intermittent non-cut portion. In the third embodiment, a V-shaped cut 2a 'and a cut 2b' are provided at two open ends in the third embodiment.
Is provided so that the lid material 1 "can be easily torn from the cuts 2a 'and 2b'. The cuts 2a 'and 2b' are not V-shaped, but are linear. The cut may be made.

The shape of the lid 1 "'according to the fourth embodiment of the present invention is as shown in Fig. 5, and the lamination structure is the same as that of the first embodiment shown in Fig. 2. The lid according to the fourth embodiment. The material 1 "" has basically the same configuration as that of the first embodiment except that the shape of the cut 2 "and the cut 2""are different. In the lid 1 "" of the fourth embodiment, a cut 2 "" extending inward from the opening end 2a and a cut 2 "" extending inward from the opening end 2b are formed, respectively, and the tip of the cut 2 "and the cut 2" are formed. The tip of "'is not connected. Therefore, when gripping the knob 3 and pulling the lid 1"',
Lid 1 "'cuts along cut 2" and cut 2 "', but cut 2"
Since the ends of the cuts 2 "'are not connected to each other, an opening can be formed without completely cutting off the lid 1"', so that the lid 1 "'can be resealed.

FIGS. 6 and 7 show embodiments of the packaging container of the present invention.
The lid member 1 of the first embodiment is attached to the container 4 by heat bonding. The container 4 to which the lid member 1 is attached includes an outer container 4a without a flange having a bottom surface and side surfaces formed by bending a blank plate made of paperboard and a flange and an inner container having a flange formed by thermoforming a thermoplastic resin sheet. 4b is integrated with the inner surface of the outer container 4a and the outer surface of the inner container 4b in close contact with each other.
Is a paragraph section 42 in which one corner is lower by one step, and a lid 41 is attached to a flange 41 made of a thermoplastic resin sheet of the container 4 so that the knob 3 of the lid 1 overlaps the paragraph 42. 1
Are bonded by heat bonding at the heat bonding section 5.

The sectional shape of the packaging container is as shown in FIG. 7, and the container 4 is formed by bonding the inner surface of an outer container 4a made of paperboard and the outer surface of an inner container 4b made of a thermoplastic resin sheet on the side and bottom surfaces. The lid member 1 is attached to the flange 41 of the container 4 formed of a thermoplastic resin sheet by heat bonding at the heat bonding portion 5. At the inner end of the flange 41 of the container 4, a step 43 is formed over the entire circumference of the opening, and the step 43 functions as a rib to give rigidity to the opening of the container 4. In a state where the lid 1 is thermally bonded to the flange 41 of the container 4, a cut 2 formed in the lid 1 is formed.
Is located at a position along the vicinity of the inner end of the flange 41 inside the thermal bonding portion 5.

In order to open the container 4 with the lid 1 attached thereto, the user grips the tab 3 of the lid 1 that overlaps with the paragraph 42 of the flange 41 of the container 4 and pulls it diagonally upward, so that the knob 3 is opened. The lid 1 is cut along the cut 2 from the two unsealing ends 2a and 2b in the vicinity, and the heat bonding part 5 inside the knob 3 is peeled off. Further, by gripping and pulling the knob 3, the lid 1 is formed along the cut 2 formed along the entire periphery of the container opening inside the thermal bonding portion 5.
Can be opened with the large opening formed. When the tab 3 is gripped and pulled, the lid 1 can be cut off along the cut 2 with a small force, so that a large force is not applied to the flange 41 of the container at the time of opening, thereby preventing deformation of the container. Can be.

Paper, synthetic paper, plastic film, a laminate of paper and plastic film, or the like can be used as the base material layer 11 constituting the lid material 1, 1 ', 1 ". When paper or synthetic paper is used, The pattern layer 15 is provided on the outer surface thereof, and when a plastic film is used, the pattern layer 15 is provided on the inner surface of the film layer 15. As the thermo-adhesive resin layer 14, a resin mainly composed of an ethylene-vinyl acetate copolymer is used. In the case of a configuration having an aluminum foil layer 13 such as the lid member 1 or 1 ″, a polyolefin such as polyethylene is used as the adhesive layer 12. The laminated structure of the lid material is as follows: 79 g of single art paper / polyethylene 15 μ / aluminum foil 7 μ / heat-adhesive resin
0μ, art paper 80-120g / heat-adhesive resin 25μ
And so on.

As the outer container 4a constituting the container 4, a paperboard such as a white ball, a manila ball, cup base paper, ivory paper, card paper or the like is used. The thickness of the paperboard is 150-400g / m
² can be used, but those having a basis weight of about 300 g / m ² are most suitable. The inner container 4b is produced by thermoforming a thermoplastic resin sheet. As the thermoplastic resin sheet, a multi-layer co-extruded sheet composed of a polyolefin layer, an ethylene-vinyl alcohol copolymer layer, and a polyolefin layer is used. The thickness of the multi-layer coextruded sheet is suitably 200 to 300 μm. In the case of a packaging container that does not require gas barrier properties, a sheet made of a single polyolefin such as polypropylene can be used. In that case, the aluminum foil layer 13 of the second embodiment can be used.
Is used without the lid material 1 '.

Although not shown, a blank plate of the outer container 4a having a side plate connected to the periphery of the bottom plate so as to be bendable is bent to form a shape shown in FIG. 6, and a metal for thermoforming the inner container 4b. After mounting in a mold, heating and coating a thermoplastic resin sheet thereon, the thermoplastic resin sheet was mounted in the mold by vacuum forming or a method combining vacuum forming and pressure forming. By thermoforming so as to adhere to the inner surface of the outer container, the outer surface of the formed inner container is adhered to the inner surface of the outer container to produce the container shown in FIG. By forming a thermo-adhesive resin layer on the inner surface side of the blank plate of the outer container 4a, the inner surface of the outer container 4a and the outer surface of the inner container 4b can be bonded and integrated when thermoforming the inner container 4b. Can be.

[0023]

According to the present invention, there is provided a cover material having a base layer on an outer surface, a heat-adhesive resin layer on an inner surface, and a knob formed at an outer end for use by being thermally bonded to a container. The lid member has a configuration in which two opening ends sandwiching the knob are formed on the outer peripheral edge, and opening means extending inward from the two opening ends are formed. In the case of this lid material, instead of peeling off the heat-bonded portion of the lid material that has been thermally bonded to the container and opening it, the user grips the tab of the lid material and pulls it along the opening means from two open ends. It is possible to cut the lid material to form an opening, and the opening can be formed with a small force. In the above lid material, the opening means is formed in a loop shape connecting the two opening ends, so that the lid material can be cut out from the two opening ends along the opening means to form an opening. Thus, the opening can be formed with a weak force. In the above lid material, the opening means is provided along the vicinity of the inner end of the heat-bonded portion formed in an annular shape when the lid material is thermally bonded to the container, so that the lid material can be used as the opening means. By cutting along, a large opening can be formed along the vicinity of the inner end of the thermal bonding portion. In the above-mentioned lid material, the opening means is a cut having an intermittent non-cut portion penetrating the base material layer, whereby the lid material can be easily cut off along the cut formed in the base material layer. In the above-mentioned lid material, by forming a cut through the lid material at the opening end, the lid material can be cut off along the cut so that opening can be easily started. In the above lid material, by having an aluminum foil layer between the base material layer and the heat-adhesive resin layer, a lid material having excellent gas barrier properties can be obtained. The above-mentioned cover material, an outer container having a bottom surface formed by bending a blank plate made of paperboard and a side surface connected to the periphery of the bottom surface, and a thermoplastic resin sheet thermoformed and brought into close contact with the inner surface of the outer container. This is a packaging container configured to be attached by thermal bonding to a flange of a container consisting of an inner container that is integrated and has a flange located at the upper end of the side surface of the outer container. By gripping and pulling the tab of the lid of the packaging container and pulling it, the lid can be cut off and opened along the opening means with a small force, so that the container flange is made of a thermoplastic resin sheet and has no rigidity. However, it can be opened without being deformed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a lid member of the present invention.

FIG. 2 is a sectional view taken along line II in FIG.

FIG. 3 is a sectional view corresponding to FIG. 2 and showing a second embodiment of the lid member of the present invention.

FIG. 4 is a plan view showing a third embodiment of the lid member of the present invention.

FIG. 5 is a plan view showing a fourth embodiment of the lid member of the present invention.

FIG. 6 is a perspective view showing an embodiment of the packaging container of the present invention.

FIG. 7 is a sectional view taken along the line II in FIG. 6;

[Explanation of symbols]

 1, 1 ', 1 ", 1"' Lid material 2, 2 ', 2 ", 2"' Cut 2a, 2b Open end 2a ', 2b' Cut 3, 3 'Knob 4 Container 4a Outer container 4b Contents Container 41 Flange 42 Paragraph section 43 Step section 5 Thermal bonding section 5 ', 5 "Thermal bonding area 11 Base layer 12 Adhesive layer 13 Aluminum foil layer 14 Thermal adhesive resin layer 15 Picture layer

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Ageo 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. (reference) 3E067 BB01A BB14A BC07A CA04 CA24 EA06 EA35 EA36 EB03 EB07 EB11 EC25 3E084 AA02 AA05 AA12 AA15 AA24 AA34 AA37 AB10 BA01 BA06 BA07 BA08 BA09 CA01 CA10 CB01 CB04 CC02 CC03 CC07 CC08 FA09 FD13 GB08 GB17 4F100 AB10C AB33C AT00A BA03 BA10 BA10A DC13 DC13A GB16 JD02J03 J03

Claims (7)

[Claims] 1. A lid material having a base layer on an outer surface, a heat-adhesive resin layer on an inner surface, and a knob formed at an outer end for use by being thermally bonded to a container, wherein the lid material is provided. A lid member having two opening ends sandwiching the knob and formed with opening means extending inward from the two opening ends, respectively. 2. The lid material according to claim 1, wherein said opening means is formed in a loop shape connecting two opening ends. 3. The method according to claim 1, wherein said opening means is provided along the vicinity of an inner end of a heat-bonded portion formed in an annular shape when said lid member is heat-bonded to a container. 4. The lid material according to 1. 4. The lid material according to claim 1, wherein said opening means comprises a cut having an intermittent non-cut portion penetrating through said base material layer. 5. The lid according to claim 1, wherein a cut is formed at the opening end so as to penetrate the lid. 6. An apparatus according to claim 1, further comprising an aluminum foil layer between said base material layer and said heat-adhesive resin layer.
6. The lid material according to any one of items 1 to 5, 7. An outer container having a bottom surface formed by bending a blank plate made of paperboard, and a side surface connected to a periphery of the bottom surface, wherein the lid material according to claim 1 is provided,
A structure in which a thermoplastic resin sheet is thermoformed and adhered to the inner surface of the outer container by thermal bonding, and the inner container is integrated with the inner container having a flange located at the upper end of the side surface of the outer container. A packaging container characterized by comprising: